Name of the Institute : National Institute of Electronics and Information Technology (nielit.gov.in)
Name of the Course : A Level Course
Subject Code/Name : A9R4/Data Communication & Network Technologies
Document Type : Old Question Paper
Location : India
Website : nielit.gov.in
Download Model/Sample Question Paper :
January 2012 : https://www.pdfquestion.in/uploads/nielit.in/7082-jan12A9-R4.pdf
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NIELIT Data Communication Sample Paper
A9-R4:
(Answer all the questions)
1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1×10)
PART ONE
Related : NIELIT Question Paper A Level Course Basics of OS, Unix & Shell Programming : www.pdfquestion.in/7081.html
1.1 A protocol is a set of rules governing a time sequence of events that must take place
A) between an interface
B) between modems
C) between peers
D) across an interface
1.2 Which of the following communications lines is best suited for interactive processing of applications?
A) full duplex lines
B) narrow band channel
C) simplex lines
D) mixed band channels
1.3 Which of the following is true about ATM and Packet Switching?
A) Both ATM and Packet Switching have relatively small size cells
B) Packet Switching has no windowing while ATM has
C) Both have fixed length cells
D) ATM has no error detection on data while Packet Switching has
1.4 The event that will not cause recalculation of the distance vector is
A) discovery of a longer path to an existing destination
B) discovery of a long path to a new destination
C) discovery that a link to a neighbor has gone down
D) to receive a shorter path to an existing destination
1.5 BOOTP is a possible solution to the problem where
A) Address space is limited
B) host IP address must be changed if he moves from one network to another
C) all hosts addresses must be changed if class B networks grow too large
D) all hosts addresses must be changed at least once a year
1.6 SNMP is not used to
A) report extraordinary events
B) retrieve specific management information
C) transfer mail through the network
D) manipulate management information
1.7 Which of the following is not a routing strategy?
A) Fixed routing
B) Adaptive routing
C) Random routing
D) Float routing
1.8 hWhich Protocol is a mechanism used by hosts and gateways to send notification of datagram problems back to the sender?
A) ICMP
B) IGMP
C) HDLP
D) POP
1.9 In the field of Communication, Data rate depends on factors like
A) The bandwidth available
B) The level of the signals used
C) The quality of the channel
D) All of the above
1.10 We call bridges that create and update their own routing tables
A) Route learning
B) Address learning
C) Transparent bridges
D) Brouters
2. Each statement below is either TRUE or FALSE. Choose the most appropriate one and ENTER in the “tear-off” sheet attached to the question paper, following instructions therein. (1×10)
2.1 HDLC is a standard synchronous communication protocol.
2.2 A protocol data unit (PDU) is exchanged between the same layers in two separate protocol stacks. It comprises the PDU passed from the layer immediately above and itsown protocol control information.
2.3 Telnet establishes a TCP connection to port 125, on which the POP3 server listens.
2.4 The presentation layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format.
2.5 In statistical TDM, slots are dynamically allocated to improve bandwidth efficiency.
2.6 Membership in a VLAN can be based on port numbers, MAC addresses, IP addresses, multicast addresses, or a combination of these features.
2.7 To distinguish between different streams, SCTP uses the sequence identifier (SI).
2.8 The minimum Hamming distance is the maximum Hamming distance between all possible pairs in a set of words.
2.9 One of the advantages of a hub is the separation of the collision domain.
2.10 A bridge does not change the physical (MAC) addresses in a frame.
PART TWO
(Answer any FOUR questions)
5. a) Explain the responsibilities of the session layer and presentation layer in OSI reference model.
b) Data can be corrupted during transmission. Explain the types of error which can be generated by corruption of data at data link layer. How CRC can be used to detect these kinds of error?
c) Explain Distance Vector Routing. Describe how split horizon technique is used to remove the problem of count infinity. (5+5+5)
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